Good thought Tim, but for some reason it doesn't work in this case (both on
10.6 & 10.7).
As you would expect, it is size/font sensitive so I can get the same failure
result (for the sample text given) with Times-Roman 11 point. Of the various
text samples, it's only 1 in 10,000 or so that don't get their height
calculated correctly.
Tony
On 26 Jan 2012, at 6:59 pm, Tim Schröder wrote:
> I had exactly the same problem and solved it by using the
> NSStringDrawingUsesDeviceMetrics option instead of
> NSStringDrawingDisableScreenFontSubstitution.
>
> Tim
>
> Am 25.01.2012 um 16:26 schrieb Tony Pollard:
>
>> Hi folks,
>>
>> I'm having a strange problem with NSAttributedString boundingRectWithSize in
>> getting the needed height for a fixed width. It works 99% of the time, but
>> it consistently underestimates the height for certain text (by approximately
>> one line). There doesn't appear to be a pattern for the text that works and
>> the text that fails (tested on 10.6 and 10.7).
>>
>> The code is:
>>
>> NSRect textRect = [attrString boundingRectWithSize:NSMakeSize(300.0, 0.0)
>> // Width 300, any height (max height also
>> fails)
>>
>> options: NSStringDrawingUsesLineFragmentOrigin | // Needed
>> for multi-line
>>
>> NSStringDrawingDisableScreenFontSubstitution];
>>
>> The attributed strings are built from data sources. Here's one that fails:
>>
>> Printing description of attrString:
>> n. {
>> CdctPhraseType = Grammer;
>> NSColor = NSCalibratedRGBColorSpace 0.878431 0.0980392 0.160784 1;
>> NSFont = "LucidaGrande 9.00 pt. P [] (0x50bbd0) fobj=0x50b7b0, spc=2.85";
>> }A hopper is a device shaped like a large funnel, in which substances such
>> as grain, coal, animal food, or sand can be stored.{
>> CdctPhraseType = Transition;
>> NSColor = NSCalibratedRGBColorSpace 0.227451 0.54902 0.258824 1;
>> NSFont = "LucidaGrande 9.00 pt. P [] (0x50bbd0) fobj=0x50b7b0, spc=2.85";
>> }
>> {
>> }F.ex: Large trailers came along and tipped it into a big hopper.{
>> CdctPhraseType = Transition;
>> NSColor = NSCalibratedRGBColorSpace 0.227451 0.54902 0.258824 1;
>> NSFont = "LucidaGrande 9.00 pt. P [] (0x50bbd0) fobj=0x50b7b0, spc=2.85";
>> }
>>
>> The resulting Rect is too short by about 9 pixels. Anyone had the same
>> problem?
>>
>> Tony Pollard
>>
>>
>>
>>
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